Automatic transmission parking mechanism collision simulation test method

Abstract

The invention discloses an automatic transmission parking mechanism collision simulation test method, and belongs to the technical field of transmission test. The method comprises the following steps: test preparation; measuring an experiment driving distance; the test vehicle head traction anchor point is connected with the collision vehicle tail traction anchor point through a steel chain; the test vehicle is engaged in a parking gear; the collision vehicle advances in a full-accelerator acceleration mode; and when the collision vehicle runs to the experimental driving distance, the accelerator is released immediately. The test vehicle tail traction anchor point is connected with the collision vehicle tail traction anchor point through a steel chain; the test vehicle is engaged in a parking gear; the collision vehicle advances in a full-accelerator acceleration mode; and when the collision vehicle runs to the experimental driving distance, the accelerator is released immediately. And the decomposition transmission analyzes the state of the parking mechanism. According to the invention, the test cost is reduced, the test accuracy and repeatability are improved, the durability of the parking mechanism under the impact of different vehicle speeds and masses is verified, the controllability of products is improved, and the competitiveness of automatic transmission products in similar products is increased.

Description

Technical Field

[0001] The invention relates to a collision simulation test method for an automatic transmission parking mechanism, belonging to the technical field of transmission testing. Background Art

[0002] As a core component of modern automobiles, the performance of automatic transmissions is not only directly related to the safety of drivers, but also affects the overall operating efficiency of the vehicle. Among them, the parking mechanism, as an indispensable part of the automatic transmission, bears the important responsibility of stabilizing the position of the vehicle when the vehicle is parked, and plays a vital role in ensuring the safety and stability of vehicle parking. However, in actual road environments, vehicles may encounter various unexpected situations, such as low-speed collision accidents. In these accidents, the parking mechanism is often subjected to strong impact forces, which may cause its structure to be damaged or its function to fail, which in turn seriously threatens the safety and reliability of the vehicle. Therefore, it is particularly important to accurately evaluate the safety performance of the parking mechanism under collision conditions.

[0003] At present, vehicle crash tests are an important means of evaluating the overall safety performance of vehicles. These tests usually simulate collision scenarios of vehicles at different speeds and mass states to comprehensively evaluate the performance of vehicles in collisions. However, such tests have many limitations.

[0004] First, they are usually conducted on a complete vehicle, and each collision test will cause serious damage to the vehicle body, resulting in high testing costs. Second, a new test vehicle needs to be replaced after each test, which not only consumes a lot of time and resources, but also makes the test difficult to repeat, thus limiting in-depth research on specific components (such as parking mechanisms). In addition, in actual collision tests, the vehicle body structure will absorb and disperse part of the collision energy, which to some extent weakens the direct impact on the parking mechanism.

[0005] As a result, the test results may not accurately reflect the actual performance of the parking mechanism under extreme collision conditions, thereby affecting the accurate assessment of the safety performance of the parking mechanism. Summary of the invention

[0006] In order to solve the problems existing in the background technology, the present invention provides a collision simulation test method for an automatic transmission parking mechanism.

[0007] To achieve the above object, the present invention adopts the following technical solution: a collision simulation test method for an automatic transmission parking mechanism, the method comprising the following steps:

[0008] S1: Experimental preparation;

[0009] S101: Install the transmission to be tested on a test vehicle, with traction anchor points installed at the front and rear of the test vehicle;

[0010] S102: Prepare another test vehicle as a collision vehicle, and install a towing anchor point at the rear of the collision vehicle.

[0011] S2: Measure the experimental driving distance S;

[0012] S201: Prepare the collision vehicle to the mass required for the test;

[0013] S202: Accelerate the collision vehicle at full throttle from 0 to 20 m / s, and obtain at least one experimental driving distance S corresponding to a required vehicle speed.

[0014] S3: simulate collision test and repeat until the test is required;

[0015] The collision test includes a forward rear-end collision test and a reverse head-on collision test.

[0016] The frontal rear-end collision test comprises the following steps:

[0017] S301: driving the test vehicle to the test road section, driving the collision vehicle in front of the test vehicle, so that the rear end of the collision vehicle is in contact with the front end of the test vehicle, and connecting the traction anchor point of the front of the test vehicle with the traction anchor point of the rear of the collision vehicle through a steel chain, the length of the steel chain being the corresponding experimental driving distance S;

[0018] S302: The test vehicle is put into parking gear;

[0019] S303: The collision vehicle accelerates forward at full throttle;

[0020] S304: When the collision vehicle travels to the experimental driving distance S, that is, when the steel chain reaches the longest distance, the collision vehicle immediately releases the accelerator, and the collision vehicle gives the test vehicle an instant forward pulling force through the steel chain, thereby simulating a frontal rear-end collision of the test vehicle.

[0021] The reverse head-on collision test comprises the following steps:

[0022] S301: driving the test vehicle to the test road section, driving the collision vehicle to the rear of the test vehicle, so that the rear end of the collision vehicle fits with the rear end of the test vehicle, and connecting the traction anchor point at the rear of the test vehicle with the traction anchor point at the rear of the collision vehicle through a steel chain, and the length of the steel chain is the corresponding experimental driving distance S;

[0023] S302: The test vehicle is put into parking gear;

[0024] S303: The collision vehicle accelerates forward at full throttle;

[0025] S304: When the collision vehicle travels to the experimental driving distance S, that is, when the steel chain reaches the longest distance, the collision vehicle immediately releases the accelerator, and the collision vehicle applies an instantaneous backward pulling force to the test vehicle through the steel chain, thereby simulating a reverse head-on collision of the test vehicle.

[0026] S4: Decompose the transmission to analyze the state of the parking mechanism.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention utilizes the traction collision method to directly perform repetitive collision simulation tests on the parking mechanism of the automatic transmission in a whole vehicle environment without causing damage to the vehicle body, which not only reduces the test cost but also improves the accuracy and repeatability of the test. At the same time, by adjusting the collision distance and the test mass to control the collision energy, the durability of the parking mechanism under different vehicle speeds and mass impacts can be verified, which can not only assess the strength of the parking mechanism but also verify the structural strength limit of the parking mechanism. The balance between cost and quality is achieved through redundant control of the ultimate strength of the parking mechanism, which improves the controllability of the product and increases the competitiveness of the automatic transmission product among similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of a frontal rear-end collision test of the present invention;

[0030] Figure 2 Schematic diagram of the reverse head-on collision test of the present invention. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] A collision simulation test method for an automatic transmission parking mechanism, the method comprising the following steps:

[0033] S1: Experimental preparation

[0034] S101: The transmission to be tested is installed on a test vehicle. The front and rear of the test vehicle are reinforced with traction anchor points, and the two traction anchor points are respectively connected to the corresponding main load-bearing beams of the vehicle;

[0035] S102: Prepare another test vehicle as a collision vehicle, and reinforce and install a traction anchor point at the rear of the collision vehicle.

[0036] S2: Measure the experimental driving distance S

[0037] S201: Prepare the collision vehicle to the mass required for the test, including the empty mass, half-loaded mass and fully loaded mass;

[0038] S202: Accelerate the collision vehicle at full throttle from 0 to 20 m / s, and obtain at least one experimental driving distance S corresponding to a required vehicle speed.

[0039] For example:

[0040] S201: Prepare the collision vehicle to the unloaded mass;

[0041] S202: Accelerate the collision vehicle on the test site from 0 m / s to 3 m / s at full throttle to obtain an experimental driving distance S1;

[0042] S203: accelerating the collision vehicle on the test site from 0 m / s to 5 m / s at full throttle to obtain an experimental driving distance S2;

[0043] S204: accelerating the collision vehicle at full throttle from 0 m / s to 510 m / s on the test site to obtain an experimental driving distance S3;

[0044] S3: simulate collision test and repeat until the test is required;

[0045] Frontal rear-end collision test:

[0046] S301: driving the test vehicle to the starting end of the test road section, driving the collision vehicle in front of the test vehicle, connecting the traction anchor point of the front of the test vehicle with the traction anchor point of the rear of the collision vehicle through an inelastic steel chain, the length of the steel chain being the corresponding experimental driving distance S; making the rear end of the collision vehicle fit with the front end of the test vehicle, that is, the steel chain is in a completely free state;

[0047] S302: The test vehicle is put into parking gear;

[0048] S303: The collision vehicle accelerates forward at full throttle;

[0049] S304: When the collision vehicle travels to the experimental driving distance S, that is, when the steel chain reaches the longest distance, the collision vehicle immediately releases the accelerator, and the collision vehicle gives the test vehicle an instant forward pulling force through the steel chain, thereby simulating a frontal rear-end collision of the test vehicle.

[0050] Reverse head-on collision test:

[0051] S301: driving the test vehicle to the end of the test road section, driving the collision vehicle to the rear of the test vehicle, connecting the traction anchor point at the rear of the test vehicle with the traction anchor point at the rear of the collision vehicle through an inelastic steel chain, the length of the steel chain being the corresponding experimental driving distance S; making the rear end of the collision vehicle fit with the rear end of the test vehicle, that is, the steel chain is in a completely free state;

[0052] S302: The test vehicle is put into parking gear;

[0053] S303: The collision vehicle accelerates forward at full throttle;

[0054] S304: When the collision vehicle travels to the experimental driving distance S, that is, when the steel chain reaches the longest distance, the collision vehicle immediately releases the accelerator, and the collision vehicle applies an instantaneous backward pulling force to the test vehicle through the steel chain, thereby simulating a reverse head-on collision of the test vehicle.

[0055] S4: Decompose the transmission to analyze the state of the parking mechanism.

[0056] The present invention realizes a kinetic energy controllable, repeatable, zero-loss parking mechanism collision test under whole vehicle conditions, can quickly and efficiently realize the actual assessment of the automatic transmission parking mechanism, can more quickly find the degree of influence of each component after a collision under the test state, can find out the weak links and optimize them, can reduce the cost of the parts with excessive strength, and put the whole system in a system balance state.

[0057] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0058] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A collision simulation test method for an automatic transmission parking mechanism, characterized in that: The method comprises the following steps: S1: Experimental preparation; S2: Measure the experimental driving distance S; S3: simulate collision test and repeat until the test is required; S4: Decompose the transmission to analyze the state of the parking mechanism.

2. The automatic transmission parking mechanism collision simulation test method according to claim 1, characterized in that: The S1 comprises the following steps: S101: Install the transmission to be tested on a test vehicle, with traction anchor points installed at the front and rear of the test vehicle; S102: Prepare another test vehicle as a collision vehicle, and install a towing anchor point at the rear of the collision vehicle.

3. The automatic transmission parking mechanism collision simulation test method according to claim 1, characterized in that: The S2 comprises the following steps: S201: Prepare the collision vehicle to the mass required for the test; S202: Accelerate the collision vehicle at full throttle from 0 to 20 m / s, and obtain at least one experimental driving distance S corresponding to a required vehicle speed.

4. The automatic transmission parking mechanism collision simulation test method according to claim 1, characterized in that: The collision test described in S3 includes a forward rear-end collision test and a reverse head-on collision test.

5. The automatic transmission parking mechanism collision simulation test method according to claim 4, characterized in that: The frontal rear-end collision test comprises the following steps: S301: driving the test vehicle to the test road section, driving the collision vehicle in front of the test vehicle, so that the rear end of the collision vehicle is in contact with the front end of the test vehicle, and connecting the traction anchor point of the front of the test vehicle with the traction anchor point of the rear of the collision vehicle through a steel chain, the length of the steel chain being the corresponding experimental driving distance S; S302: The test vehicle is put into parking gear; S303: The collision vehicle accelerates forward at full throttle; S304: When the collision vehicle travels to the experimental driving distance S, that is, when the steel chain reaches the longest distance, the collision vehicle immediately releases the accelerator, and the collision vehicle gives the test vehicle an instant forward pulling force through the steel chain, thereby simulating a frontal rear-end collision of the test vehicle.

6. The automatic transmission parking mechanism collision simulation test method according to claim 4, characterized in that: The reverse head-on collision test comprises the following steps: S301: driving the test vehicle to the test road section, driving the collision vehicle to the rear of the test vehicle, so that the rear end of the collision vehicle fits with the rear end of the test vehicle, and connecting the traction anchor point at the rear of the test vehicle with the traction anchor point at the rear of the collision vehicle through a steel chain, and the length of the steel chain is the corresponding experimental driving distance S; S302: The test vehicle is put into parking gear; S303: The collision vehicle accelerates forward at full throttle; S304: When the collision vehicle travels to the experimental driving distance S, that is, when the steel chain reaches the longest distance, the collision vehicle immediately releases the accelerator, and the collision vehicle applies an instantaneous backward pulling force to the test vehicle through the steel chain, thereby simulating a reverse head-on collision of the test vehicle.

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